Restaurants

Even the iconic McDonald's french fry, a linchpin to the fast-food giant's multibillion-dollar success, is getting a second look as the company seeks new product hits.

On Thursday, the same day McDonald's announced that domestic sales were flat in April, the company confirmed to USA TODAY that it will begin testing seasoned fries -- dubbed Shakin' Flavor Fries -- on Friday in the Northern California and St. Louis markets.

On Tuesday, the burger chain will announce the March 17 national rollout of two new menu items to its salad lineup: an Asian Cashew Chicken Salad and a BBQ Ranch Chicken Salad. Also, Wendy's will announce plans to add more fresh veggies — cucumbers and red peppers — to its spiffed-up side salads,